diff --git a/.eslintrc b/.eslintrc
index b518529..1723a0b 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -15,6 +15,7 @@
   "rules":  {
     "max-len": ["error", { "code": 150, "ignoreComments": true, "ignoreStrings": true, "ignoreTemplateLiterals": true }],
     "@typescript-eslint/explicit-module-boundary-types": "off",
-    "@typescript-eslint/ban-ts-comment": "off"
+    "@typescript-eslint/ban-ts-comment": "off",
+    "no-constant-condition": "warn"
   }
 }
diff --git a/src/anvato/AnvatoDrmFairplayContentProtectionIntegration.ts b/src/anvato/AnvatoDrmFairplayContentProtectionIntegration.ts
index 1da183b..2b3188b 100644
--- a/src/anvato/AnvatoDrmFairplayContentProtectionIntegration.ts
+++ b/src/anvato/AnvatoDrmFairplayContentProtectionIntegration.ts
@@ -50,7 +50,7 @@ export class AnvatoDrmFairplayContentProtectionIntegration implements ContentPro
     return request;
   }
 
-  onLicenseResponse?(response: LicenseResponse): MaybeAsync<BufferSource> {
+  onLicenseResponse(response: LicenseResponse): MaybeAsync<BufferSource> {
     const responseObject = fromUint8ArrayToObject(response.body);
     return fromBase64StringToUint8Array(responseObject.ckc);
   }
diff --git a/src/anvato/AnvatoDrmFairplayContentProtectionIntegration.web.ts b/src/anvato/AnvatoDrmFairplayContentProtectionIntegration.web.ts
index c2d3aaf..aae3cfc 100644
--- a/src/anvato/AnvatoDrmFairplayContentProtectionIntegration.web.ts
+++ b/src/anvato/AnvatoDrmFairplayContentProtectionIntegration.web.ts
@@ -84,7 +84,7 @@ export class AnvatoDrmFairplayContentProtectionIntegration implements ContentPro
     }
   }
 
-  onLicenseResponse?(response: LicenseResponse): MaybeAsync<BufferSource> {
+  onLicenseResponse(response: LicenseResponse): MaybeAsync<BufferSource> {
     throw new AnvatoError('Error during FairPlay license request', 'Response already processed', response.url);
   }
 
@@ -106,16 +106,12 @@ async function readStreamAsArrayBuffer(readable: ReadableStream<Uint8Array>): Pr
   const chunks: Uint8Array[] = [];
   let totalLength = 0;
 
-  async function readNextChunk() {
+  while (true) {
     const { done, value } = await reader.read();
-    if (done) return;
+    if (done) break;
     chunks.push(value);
     totalLength += value.length;
-
-    // Read the next chunk
-    await readNextChunk();
   }
-  await readNextChunk();
 
   // Concatenate all chunks into a single Uint8Array
   const result = new Uint8Array(totalLength);
diff --git a/src/anvato/AnvatoDrmWidevineContentProtectionIntegration.ts b/src/anvato/AnvatoDrmWidevineContentProtectionIntegration.ts
index adebaa8..c8e3c83 100644
--- a/src/anvato/AnvatoDrmWidevineContentProtectionIntegration.ts
+++ b/src/anvato/AnvatoDrmWidevineContentProtectionIntegration.ts
@@ -38,7 +38,7 @@ export class AnvatoDrmWidevineContentProtectionIntegration implements ContentPro
     return request;
   }
 
-  onLicenseResponse?(response: LicenseResponse): MaybeAsync<BufferSource> {
+  onLicenseResponse(response: LicenseResponse): MaybeAsync<BufferSource> {
     const responseObject = fromUint8ArrayToObject(response.body);
     return fromBase64StringToUint8Array(responseObject.ckc);
   }
diff --git a/src/verimatrixcoredrm/VerimatrixCoreDrmFairplayContentProtectionIntegration.ts b/src/verimatrixcoredrm/VerimatrixCoreDrmFairplayContentProtectionIntegration.ts
index a99d26e..bcdc233 100644
--- a/src/verimatrixcoredrm/VerimatrixCoreDrmFairplayContentProtectionIntegration.ts
+++ b/src/verimatrixcoredrm/VerimatrixCoreDrmFairplayContentProtectionIntegration.ts
@@ -28,7 +28,7 @@ export class VerimatrixCoreDrmFairplayContentProtectionIntegration implements Co
     return request;
   }
 
-  onLicenseResponse?(response: LicenseResponse): MaybeAsync<BufferSource> {
+  onLicenseResponse(response: LicenseResponse): MaybeAsync<BufferSource> {
     const responseObject = fromUint8ArrayToObject(response.body);
     return fromBase64StringToUint8Array(responseObject.ckc);
   }